Genuine OEM Audi Radiator Upper Hose, part number 1K0121101CE. This critical component is responsible for carrying engine coolant to and from the radiator, playing a vital role in maintaining optimal engine operating temperature. Positioned as the upper hose, it connects key parts of the cooling system. Weighing approximately 0.23 kg, this hose is constructed from durable, heat-resistant rubber. Choosing a genuine OEM radiator hose ensures the correct routing geometry, material composition, and pressure resistance, preventing leaks and maintaining the integrity of the engine cooling system.